Calculation of the Energy Band Gap and some Optical Properties of Single Wall Carbon Nanotube Calculation of the Energy Band Gap and some Optical Properties of Single Wall Carbon Nanotube

Abstract

Carbon Nanotube (CNT) is tubular form carbon with diameter as small as 1nm and length of few nanometers to microns. CNT is configurationally equivalent to a two dimensional graphene sheet rolled into a tube. The aim of research was manufacturing single walled carbon nanotube and calculation its absorbance, transmission and energy gap. In this research the optical properties investigated. Three different types of single walled carbon nanotube (lampblack, kohl and frankincense) weighted by using electric balance and dissolved in four hydrocarbon solutions benzene, acetone, methanol and ethanol in order to obtain 12 samples of single walled carbon nanotube to study their optical properties such as absorption and transmission. The absorbed spectrum and energy gap were studied using USB Spectrophotometer which gives higher absorptivity wavelength for lampblack at 477 nm in methanol solution, and higher absorbance for kohl in benzene solution and equal 1.20 au and higher transmission for frankincense in acetone solution equal 29.4 %, higher energy gab of lampblack, kohl and frankincense in methanol solution and equal 2.53 eV.